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| Content Provider | IET Digital Library |
|---|---|
| Author | Aziz, Rao Shahid Kim, Tae Wan Park, Jae Seok Ryu, Young Ho Park, Seong Ook |
| Abstract | A novel electromagnetic (EM) lens with high gain, suppressed side-lobe level (SLL) and low profile is designed using thin planar metasurfaces. The proposed design consists of a source patch antenna and an EM lens based on two thin planar metasurfaces. The two thin metasurfaces with an air gap are placed at the focal distance H of about λ/2.25 above the source patch antenna. This configuration forms a thin planar lens in which the source patch antenna emitted quasi-spherical wave in order to transform into plane wave. The total size of source antenna and an EM lens is same. The miniaturised EM lens antenna faces high SLL, which can be reduced by maintaining the uniform transmission phase coefficient and tunable transmission amplitude coefficient of metasurface unit cells. By implementing this topology on metasurfaces, the SLL of the proposed EM lens can be reduced without affecting the boresight gain of source patch antenna. The measured results of the proposed EM lens achieve 7 dB gain enhancement at designed frequency (5.8 GHz) with the SLL suppression of −24 dB. The total volume of planar lens antenna is 1.17λ × 1.17λ × λ/2.25 mm3, which is very compact compared with other reported planar lens designs. |
| Starting Page | 950 |
| Ending Page | 958 |
| Page Count | 9 |
| ISSN | 17518725 |
| Volume Number | 13 |
| e-ISSN | 17518733 |
| Issue Number | Issue 7, Jun (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-map/13/7 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-map.2018.5671 |
| Journal | IET Microwaves, Antennas & Propagation |
| Publisher Date | 2019-02-11 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Air Gap Antenna Accessory Antenna Feeds Antenna Radiation Pattern Electromagnetic Lens Frequency 5.8 GHz Gain 7.0 DB Gain Enhancement High Antenna Gain Lens Antenna Metamaterial Antenna Metasurface Unit Cell Microwave Antenna Miniaturised EM Lens Antenna Planar Lens Antenna Planar MetasurFace Quasispherical Wave Single Antenna SLL Application Source Patch Antenna Suppressed Side-lobe Level Thin Planar MetasurFace Tunable Transmission Amplitude Coefficient Uniform Transmission Phase Coefficient |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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